Process of carding tobacco.



N. & A. DU BRUL.

PROCESS OF GA'RDING TOBACCO.

APPLIOATION IILBD-D EO. 21, 1912.

Patented Aug. 11, 1914,

WITNESSES g INVE ORS THE NORRIS PETERS 00. Pnufuuruu. WASHINGTON. D, c.

UNITED STATES OFFICE- NAPOLEON DU BRUL, or eINoINNaTI, 0310, AND A B R DUBEUL, or EonTTHoMAs, KENTUCKY, ASSIGNORS' To THE MILLER DU BRUL AND PETERS MFG. 00., or CIN- oINNATI, 0310, A CORPORATION or OHIO.

PROCESS OF CARDING To Aooo.

Specification of Letters Patent.

Patented Aug.11,1914.

Application filed December 21, 1912. Serial No. 738,086.

To all whom it may concern:

Be it known that we, NAPOLEON DU BRUL, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, and ALBERT DU BRUL, a citizen of the United States, residing at Fort Thomas, in the county of Campbell and State of Kentucky, have invented certain new and useful Improvements in Processes of Carding Tobacco, of which the following is a specification.

The object of our process is to card tobacco and form it into a body uniform as to quality and condition.

It is a well known fact that when tobacco is placed in a hopper under conditions in which its weight can exert a material influence upon its presentation to a feeder or forming roll, due to the gradual reduction in the quantity of the material in the hopper, as well as climatic and other conditions, there is a serious lack of uniformity in the quantity of tobacco picked up by the feed or former roll with the result that serious irregularity exists in the distribution of the tobacco in forming a prescribed body of the carded tobacco.

Our invention has for its object to overcome these conditions in order to obtain a more regular feeding of the material and the formation of a body from said tobacco of uniform thickness and density throughout its structure.

The figure of the drawing is a vertical section of one form of machine designed to carry out our process.

Referring generally to the figure, 1 represents a hopper having its bottom formed by an endless belt 2, driven in the direction to advance material to a feed roll 3, there being a series of these restraining means which are in the shape of raking arms on said shaft, the lower ends of said arms being deflected as shown.

6 is a tamping or packing device mounted on the shaft 5 and adapted to be swung in an arc with said shaft so as to have impact against the periphery of the feed roll 3.

7 is a dresser roll for acting with the feed roll 3.

8 is a stripping roll and 9 is a replacing roll adapted to press the tobacco firmly upon the feed roll to limit the effect of the stripping roll on the tobacco with which it is immediately engaging.

In carrying out our process the tobacco to be carded is placed on the conveyer belt 2 in the hopper 1, by means of which the bulk of the tobacco is fed toward the feeding roll, but in order to prevent the tobacco under treatment banking against the feed roll and at intervals to be rolled about as a mass, without the proper amount being picked up by the teeth, which results in the tobacco being torn away from the main bulk and reduced to fine particles, and being fed in irregular quantities to the roll, we retard or restrain the progress of the mass of to bacco by the oscillation of the arms 4 which have the effect, generally speaking, of a rake, thereby raising the tobacco and restraining it from advancing to the feed roll and at the same time loosening the material up, or flufiing it and preventing it from matting down or packing too closely in the space through which it advances to the feed roll. Even with the feeding of the substantially uniform quantity of tobacco to the feeding roll, the presentation of the charge of tobacco to the stripping roll is not always uni form in thickness, owing to the difiiculty of causing the tobacco to enter firmly and uniformly between the carding teeth on the feed roll 3. To overcome this objection we tamp the tobacco by means of the tampers 6 on the feed roll which has the effect of pack ing the tobacco firmly down into the spaces between the teeth and developing a uniform layer or charge of tobacco on the feed roll and giving it the particular density desired. After the tobacco has been tamped, all surplus tobacco is removed from the feeding roll 3, by means of the dresser roll 7. By this dressed roll we are enabled to remove all that portion of the tobacco lying outside of the layer desired to be delivered by the feed roll to the stripper 8. The dresser roll co-acts With the feed roll at a point immediately after the tamping point, as it is thereby better enabled to pick off and remove the excess tobacco at this point Without disturbing the portion of the charge desired to be retained on the feed roll. I

What We claim is:

The process of forming a tobacco filler for cigarettes which consists in fiufiing the tobacco in bulk, feeding the flufi'ed tobacco to a feeder,ta1nping the flufied tobacco on NAPOLEON DU BRUL. ALBERT DU BRUL.

In presence of two witnesses:

HARRY 111 121011,

W. J. HUNTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

